The sine is the y coordinate of the point at which the line y= -2x and the unit circle, intersect. What is that point? (Of course, the line and circle intersect intwopoints. You want the one in the second quadrant.)

Results 1 to 2 of 2

- July 21st 2010, 12:55 PM #1

- Joined
- Jul 2010
- Posts
- 15

- July 21st 2010, 01:04 PM #2

- Joined
- Apr 2005
- Posts
- 17,585
- Thanks
- 2234